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client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by SJ1PEPF00001CEA.mail.protection.outlook.com (10.167.242.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8880.14 via Frontend Transport; Tue, 24 Jun 2025 14:14:32 +0000 Received: from SATLEXMB03.amd.com (10.181.40.144) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Tue, 24 Jun 2025 09:14:31 -0500 Received: from xcbalucerop40x.xilinx.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39 via Frontend Transport; Tue, 24 Jun 2025 09:14:30 -0500 From: To: , , , , , , , , CC: Alejandro Lucero , Martin Habets , Edward Cree , "Jonathan Cameron" Subject: [PATCH v17 12/22] sfc: get endpoint decoder Date: Tue, 24 Jun 2025 15:13:45 +0100 Message-ID: <20250624141355.269056-13-alejandro.lucero-palau@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250624141355.269056-1-alejandro.lucero-palau@amd.com> References: <20250624141355.269056-1-alejandro.lucero-palau@amd.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Received-SPF: None (SATLEXMB04.amd.com: alejandro.lucero-palau@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00001CEA:EE_|BL3PR12MB6595:EE_ X-MS-Office365-Filtering-Correlation-Id: b6672f01-b222-4ca8-5c54-08ddb32970bf X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|7416014|376014|1800799024; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Jun 2025 14:14:32.1740 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b6672f01-b222-4ca8-5c54-08ddb32970bf X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00001CEA.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR12MB6595 From: Alejandro Lucero Use cxl api for getting DPA (Device Physical Address) to use through an endpoint decoder. Signed-off-by: Alejandro Lucero Reviewed-by: Martin Habets Acked-by: Edward Cree Reviewed-by: Jonathan Cameron --- drivers/net/ethernet/sfc/Kconfig | 1 + drivers/net/ethernet/sfc/efx_cxl.c | 32 +++++++++++++++++++++++++++++- 2 files changed, 32 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig index 979f2801e2a8..e959d9b4f4ce 100644 --- a/drivers/net/ethernet/sfc/Kconfig +++ b/drivers/net/ethernet/sfc/Kconfig @@ -69,6 +69,7 @@ config SFC_MCDI_LOGGING config SFC_CXL bool "Solarflare SFC9100-family CXL support" depends on SFC && CXL_BUS >= SFC + depends on CXL_REGION default SFC help This enables SFC CXL support if the kernel is configuring CXL for diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c index e2d52ed49535..c0adfd99cc78 100644 --- a/drivers/net/ethernet/sfc/efx_cxl.c +++ b/drivers/net/ethernet/sfc/efx_cxl.c @@ -22,6 +22,7 @@ int efx_cxl_init(struct efx_probe_data *probe_data) { struct efx_nic *efx = &probe_data->efx; struct pci_dev *pci_dev = efx->pci_dev; + resource_size_t max_size; struct efx_cxl *cxl; u16 dvsec; int rc; @@ -86,13 +87,42 @@ int efx_cxl_init(struct efx_probe_data *probe_data) return PTR_ERR(cxl->cxlmd); } + cxl->endpoint = cxl_acquire_endpoint(cxl->cxlmd); + if (IS_ERR(cxl->endpoint)) + return PTR_ERR(cxl->endpoint); + + cxl->cxlrd = cxl_get_hpa_freespace(cxl->cxlmd, 1, + CXL_DECODER_F_RAM | CXL_DECODER_F_TYPE2, + &max_size); + + if (IS_ERR(cxl->cxlrd)) { + pci_err(pci_dev, "cxl_get_hpa_freespace failed\n"); + rc = PTR_ERR(cxl->cxlrd); + goto endpoint_release; + } + + if (max_size < EFX_CTPIO_BUFFER_SIZE) { + pci_err(pci_dev, "%s: not enough free HPA space %pap < %u\n", + __func__, &max_size, EFX_CTPIO_BUFFER_SIZE); + rc = -ENOSPC; + goto put_root_decoder; + } + probe_data->cxl = cxl; - return 0; + goto endpoint_release; + +put_root_decoder: + cxl_put_root_decoder(cxl->cxlrd); +endpoint_release: + cxl_release_endpoint(cxl->cxlmd, cxl->endpoint); + return rc; } void efx_cxl_exit(struct efx_probe_data *probe_data) { + if (probe_data->cxl) + cxl_put_root_decoder(probe_data->cxl->cxlrd); } MODULE_IMPORT_NS("CXL"); -- 2.34.1